2. Video Download Helper

This is a must have add-on for video, audio and picture gallery downloads from popular services like Youtube, MySpace and Google Video etc. When an embedded audio or video file is detected on a website the downloadhelper icon gets animated and you can download the required media.

DownloadHelper also allows you to download files one by one, so that you keep bandwidth to surf for other stuff to download.

3. Speed Dial

You can easily access your most used websites with Speed Dial. To show the Speed Dial tab, use the Speed Dial button (which can be added to the toolbar), or enter “chrome://speeddial/content” in your location bar.
To assign one website to Speed Dial, use the new “Set as Speed Dial” option in the bookmarks menu, or right click on the tab you want to add, and choose “Set as Speed Dial”.

4. Adblock Plus

This add-on lets you get rid of flashy banners and advertisements. It blocks all unwanted content like banners, annoying scripts and adverts. Right-click on a banner and choose “Adblock” from the context menu – the banner won’t be downloaded again.

This comes in particularly handy for sites like TechCrunch, which have flashing banners that are distracting you from the content that really matters.

5. Trailfire

With trailFire you can mark webpages that you find interesting by leaving notes right on the page. These notes are linked together into trails that you organize any way you desire. The trails you make will guide people on the web , the approach is collaborative as other people can leave responses on the trails you made and even add new marked pages. The next time you are looking for something on the Web, use Trailfire to mark the pages you find and they will be automatically shared with everyone else through the search engines. You can also keep your trails private if you wish to.